Kareena Kapoor, Aamir Khan shoot underwater scene in London

Kareena Kapoor and Aamir Khan are currently filming an underwater action sequence in London.

The five-day shoot is taking place at an undisclosed location for Reema Kagti's as yet untitled film.

"I can't reveal anything about the film, but I think I am just very lucky to be working with Aamir Khan for the second time around. It is just a pleasure," Kapoor told Bollywood reporter Sunny Malik.

"We worked together [on] 3 Idiots, and now in this film I have a very special and iconic role. The film will release [in] June 2012. I am very excited about the release. The shoot is going to be underwater, but it's a heated pool," she added.

According to a production source, Kapoor and Khan had started working on the underwater scene in Mumbai before producers decided to reshoot the scene at a fully equipped aqua studio.

Bengali actress Rani Mukherji is also part of the project, but does not feature in the London shoot.

Kagti received critical acclaim for her ensemble cast debut Honeymoon Travels Pvt, a road movie principally set onboard a coach trip to Goa.